Qhov zoo ntawm tus kheej zoo siab switching fais fab mov
Tus neeg xa khoom ntawm tus kheej zoo siab hloov pauv hloov pauv yog lub zog hloov hluav taws xob tsim los ntawm kev sib cuam tshuam oscillation circuits, thiab nws kuj yog ib qho ntawm cov khoom siv hluav taws xob yooj yim siv tam sim no. Lub raj xa hluav taws xob nyob rau hauv tus kheej zoo siab switching fais fab mov plays ob lub luag hauj lwm ntawm switching thiab oscillation, thiab tswj Circuit Court kuj raug tshem tawm. Nyob rau hauv Circuit Court, txij li thaum lub load nyob rau hauv lub thib ob sab ntawm lub transformer transformer thiab ua hauj lwm nyob rau hauv ib tug flyback lub xeev, nws muaj qhov zoo ntawm kev sib cais ntawm kev tawm tswv yim thiab cov zis. Qhov no Circuit Court tsis yog tsuas yog haum rau high-power fais fab mov, tab sis kuj rau low-power power supply.
Taw qhia
Self-excited switching fais fab mov yog ib tug switching fais fab mov muaj li intermittent oscillation Circuit Court, thiab nws kuj yog ib qho ntawm cov khoom siv hluav taws xob yooj yim siv tam sim no. Thaum cov khoom siv hluav taws xob txuas nrog, R1 muab qhov pib tam sim no rau lub raj hloov VT1, kom VT1 pib ua, thiab nws cov khoom siv tam sim no Ic nce linearly hauv L1, thiab cov lus tawm tswv yim zoo uas ua rau lub hauv paus ntawm VT1 zoo thiab cov emitter. Qhov tsis zoo yog induced hauv L2, ua rau VT1 saturate sai heev. Nyob rau tib lub sijhawm, qhov induced voltage tsub C1. Raws li kev them nqi hluav taws xob ntawm C1 nce, lub hauv paus peev xwm ntawm VT1 maj mam txo qis, ua rau VT1 tawm hauv cheeb tsam saturation, thiab Ic pib txo. Induction nyob rau hauv L2 ua rau lub hauv paus ntawm VT1 tsis zoo thiab lub emitter zoo heev voltage ua VT1 txiav tawm sai sai, lub sij hawm no diode VD1 yog qhib, thiab lub zog khaws cia nyob rau hauv thawj winding ntawm high zaus transformer T yog tso tawm rau lub load. Thaum VT1 raug txiav tawm, tsis muaj qhov cuam tshuam qhov hluav taws xob hauv L2, thiab DC fais fab mov input voltage thim rov qab tsub C1 txog R1, maj mam nce lub hauv paus peev xwm ntawm VT1, ua rau nws tig dua, tig dua mus txog lub xeev saturated, thiab lub voj voog txuas ntxiv oscillate li no. Ntawm no, zoo li ib qho kawg flyback switching fais fab mov, qhov thib ob winding ntawm transformer T outputs qhov yuav tsum tau voltage rau lub load.
Qhov zoo
Lub raj xa hluav taws xob nyob rau hauv tus kheej zoo siab switching fais fab mov plays ob lub luag hauj lwm ntawm switching thiab oscillation, thiab tswj Circuit Court kuj raug tshem tawm. Nyob rau hauv Circuit Court, vim hais tias lub load yog nyob rau hauv lub thib ob sab ntawm lub transformer thiab ua hauj lwm nyob rau hauv ib tug flyback lub xeev, nws muaj qhov zoo ntawm kev sib cais kev sib cais ntawm cov tswv yim thiab cov zis. Qhov no Circuit Court tsis yog tsuas yog haum rau high-power fais fab mov, tab sis kuj rau low-power power supply.
Self-excited switching fais fab mov yog ib tug switching fais fab mov muaj li intermittent oscillation Circuit Court, thiab nws kuj yog ib qho ntawm cov khoom siv hluav taws xob yooj yim siv tam sim no.
